take about a weeks worth of clothes, maybe a little more in the way of socks if you've feet like me. Pair boots, a good winter jacket as its freezing at the moment and will be untill march. a lot of the camps have self service washers, otherwise the bigger camps its a three day turn around for washing. As for phoning home skyping, I'm on a smaller base and could do it everyday if I wanted, but also I'd bring an old mobile with you and pop a roshan/awcc/etisilat sim in it, roughly 12-16p a text home.
And as for entertainment, it depends. I have my laptop with which i play a lot of games on and i also read a lot. A few boys have got indian sky tv. So you can set your self up pretty good depending on where you end up.
Take it easy mate and all the best.